/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.jbpm.bpmn2.xml;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;

import org.jbpm.bpmn2.core.*;
import org.jbpm.bpmn2.core.Error;
import org.jbpm.compiler.xml.Handler;
import org.jbpm.compiler.xml.Parser;
import org.jbpm.compiler.xml.ProcessBuildData;
import org.jbpm.compiler.xml.core.BaseAbstractHandler;
import org.jbpm.ruleflow.core.RuleFlowProcess;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

public class EscalationHandler extends BaseAbstractHandler implements Handler {

    @SuppressWarnings("unchecked")
    public EscalationHandler() {
        if ((this.validParents == null) && (this.validPeers == null)) {
            this.validParents = new HashSet();
            this.validParents.add(Definitions.class);

            this.validPeers = new HashSet();
            this.validPeers.add(null);
            this.validPeers.add(ItemDefinition.class);
            this.validPeers.add(Message.class);
            this.validPeers.add(Interface.class);
            this.validPeers.add(Escalation.class);
            this.validPeers.add(Error.class);
            this.validPeers.add(Signal.class);
            this.validPeers.add(DataStore.class);
            this.validPeers.add(RuleFlowProcess.class);

            this.allowNesting = false;
        }
    }

    @SuppressWarnings("unchecked")
    public Object start(final String uri, final String localName,
            final Attributes attrs, final Parser parser)
            throws SAXException {
        parser.startElementBuilder(localName, attrs);

        String id = attrs.getValue("id");
        String escalationCode = attrs.getValue("escalationCode");

        ProcessBuildData buildData = (ProcessBuildData) parser.getData();
        Map<String, Escalation> escalations = (Map<String, Escalation>) buildData.getMetaData(ProcessHandler.ESCALATIONS);
        if (escalations == null) {
            escalations = new HashMap<>();
            buildData.setMetaData(ProcessHandler.ESCALATIONS, escalations);
        }
        Escalation e = new Escalation(id, escalationCode);
        escalations.put(id, e);
        return e;
    }

    public Object end(final String uri, final String localName,
            final Parser parser) throws SAXException {
        parser.endElementBuilder();
        return parser.getCurrent();
    }

    public Class<?> generateNodeFor() {
        return Escalation.class;
    }

}
